Shock absorber



Alowing is a specification.

The present invention,l relates in generalueiree 'stares eminem*sYLvEsTEa Lene, or sAL'r canela-WYOMING.

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iaaaeea To` all whom it may concern Be it known that l, EMMETTSYLvnsTnR' LEHR, a citizen of the United States, and a resident of SaltCreek, in the county of ments in Shock Absorber-s, of which the foltospring suspension for vehicles, and more -particularly to a shockabsorber for spring suspensions. l

The object ofthe invention is to provide a shock absorber of thischaracter which is especially effective'to .dampen or cushion therebound to thereby relieve the vehicle of sudden shocks vand jars topreclude breakage of the parts of the-running gear and associ: atedstructure andto give to the vehicle qualities of easy` riding and ofcomfort.

Other objects and advantages of the invention resider incertain novelfeatures of construction, combination and arrangement of parts whichwill be hereinafter more to the accompanying drawingsforming partfullydescribed and particularly pointed out' in the appended claims,reference being had i of this speciicationd, and in which:

Figure'l is a plan view of the invention;

View therepf; and

Figure 3 is a transverse horizontal sectional view on line 3-3 of Figure2.

Referring to the drawings wherein for the sake of illustration is shownthe preferred embodiment ofthe invention, the numeral 10 designates a Zbracket adapted to be secured to the vehicle body or the like, and thenumeral 11 designates a second Z- bracket adapted to be secured to theaxle of the vehicle or the like.

A cylinder 12 is provided and has a lower cylinder head 13 provided witha vent opening 14 normally closed by a closure cap 15 and anuppercylinder head 16 having a central piston rod opening 17, and asecond opening 18 having a valve seat 19 for ap'urpose to hereinaftermore fully ap-L peal? i Means is provided for universally connecting thecylinder to the Z-bracket 11 and includes a ball 2O integrally formed atthe carried on an arm 23 secured by means of Specification of LettersPatent.

Figure 2 is a transverse vertical sectional Patentedluly 25, 1922.

Application led November 18, 1920.. Serial No. 424,926f

screws lor similar fastenings 24 to an arm of the Z-bracket 11.

A piston 25 is mounted for reciprocatory` movement in the cylinder l2and is provided with piston rings 26 which bear against the vinner wallof th-e cylinder to sea'lythe piston. The piston is provided with anopening 27 therethrough having a valve seat '28 for a-purpose to behereinafter lmore full -desc-ribed. A piston rod 29 is secured to t episton and extends through the opening 17 of theA upper cylinder head toeX- teriorlyof thetcylinder.

Means isv provided for universally connectingthe piston ro'd tothe'bracket 10 and includes a ball 31 integrally formed or otherwisesecured to the upper end of the piston rod 29 and received in andcooperating with a socket 32 carried by the bracket 11 and including aremovable section 33 secured in assembly by fastening means 34.

A pressure operated valve 35 is arranged to cooperate with vthevalve'seat 28 of the opening through the pistoni 25. The valve isprovided with an opening 36 therethrough and an elongated tubular stem37 is integrally formed with or otherwise-secured to the valve and` hasits opening aline and' communicating with the opening of the .valve-35.The elongated tubularvvalve 37 to cooperate with the valve seat 19 oftheopening through the upper piston head. i

The valve 38 also has an opening therethrough, indicated atl 39, and isprovided with a tubular stem 40 whose opening is alined with the openingin the valve 38. The valve 35 and the valve 38 are alined; A stand pipe41 extends through the openings and tubular valve stems of the valves.

35 and 38 and is adapted when desired to establish communication' withthe interior of the cylinder below the piston v25 and the atmosphere. Ahand-cock42 controls the stand pipe 41 and is effective to establishcommunication in various degrees or entirelyV shuts oil' communicationas desired.A

A cylindrical casing 43 having Ian upper lclosed end 44 is associatedwith the piston rod 29 at its upper end by means of asetl screw 45' andslidably encloses the cylinder ai e 12. The casing 43 is effective tohouse and .protect the cylinder and the pistonrod as well as the standpipe4l.,A The stand pipe 4l is preferably carried by the casing 43 4andits upper end is preferably threaded to the casing, as designated at 46.The cylinder l2 below the piston 25 is preferably partially filled withoil, designated at 47, in Figure 2.

In operation it will be understoodthat" the cylinder and this resistanceciisliions or dampers the rebound to prevent undesirable shocks. Thedegree of this rare-faction may be adjusted or.varied by the hand-cock42 which may be Vmanipulated to entirely cut off admission of air belowthe piston 25 0r which may be adjusted to admit a limited amount of airtlierebelow as desired.

Itis to be noted that when the piston 25 descends on impact theelongated tubular valve stem 37 of the valve 35 eventually strikes thelower cylinder head 13 and positively opens the lvalve 35 to permit theoilA 47 to flow above the piston 2,5. Moreover the valve 35 remains openfor a .short time during the initial up-stroke or movement of lthepiston until the piston has lifted theA valve stem clear of thelowercyli'nder head.

, I claim:

l. In a shock absorber of the character de-v scribed, a bracket adaptedto be secured to bthe vehicle body, a bracket adapted to be secured tothe axle or the like, a cylinder having a lower cylinder head -and anupper cylinder head provided with a piston rod opening and with anotheropening having a valve seat, means for universally connecting saidycylinder to said axle bracket, a piston reciprocable in said cylinderand having an opening therethrough provided with a valve seat, a pistonrod for the piston', means for universally connecting the piston rod tothe vehicle body' bracket, a pressure operated `valve cooperable withthe valve seat of the piston and provided with an opening and having anelongated tubular valve stem adapted to coact with the lower head of thecylinder to positivelyv operate said valve, asecond pressure operatedv'alve cooperable with the valve seat of the upper cylinder head andhaving an opening therethrough and a tubular valve stem, a stand pipeextending through the openings of said valves and their tubular valvelstems to the atmosphere, a hand-cock controlling 'said stand pipe, and acylindrical casing having a closed end secured to the piston rod at itsupper endslidably enclosing said cylinder.

2. In a shock absorber of the character described, a bracket adapted tobe secured to the vehicle body, a bracketadapted to be secured to theaxle, a cylinder havingl ag lovver4 cylinder head and an upper cylinhead provided with a piston rod 4opening and with another opening havinga valve seat, means for universally connecting said A cylinder topositively operate said valve,

a second pressure operated valve cooperable with the valve seat of theupper cylinder head andhaving an opening therethrough and a tubularvalve stem, a stand pipe extending through the opening of said valvesand their' tubular valve stems to the atmosphere, and a hand-cockcontrolling said stand pip V described, a cylinder having a lowercylin"I yder head and an upper cylinder -head provided vvitli a pistonrod opening and another opening having Ya valve seat, a pistonreciprocable 1n said cylinder and having anopening therethrough providedwith a valve seat, a piston rod connected with said piston and operatingthrough the piston rod opening of :the upper cylinder head, a pressureoperable valve cooperable with the valve seat of the piston and rovidedwith an opening and having an e ongated tubular valve stem adated tocoac-t with the lower head of the cylinder to positively'operate saidvalve, a second pressure valve `cooperating with the valve seat oftheupper head and having openings therethrough and a tubular valvestern, astandpipe extending through the openings of said valve and their tubularvalve. stems to the atmosphere, a hand cock controlling said stand pipeand a cylindrical casing having a closed end secured to the pistonrod atitsI upper end and slidably enclosing said cylinder.

4. ln ashockabsorber of the character described, a'cylinder having alower cylinder head and an upper cylinder head provided with an 'openinghaving a valve seat, a pistonreciprocable in said cylinder and having anopening therethrough provided with a valve seat, a pressure operatedvalve 3. In a lshock absorber of the character/f cooperable withthevalve seat of the piston and provided with an elongated tubular valvestem ada'ited to coact w1th the lowerhead of the cylinder nto positivelyoperatesaid valve, a second openings of said valvesY and their tubularAvalve stems to the atmosphere, land means for controlling thecommunication of said` stand pipe with the atmosphere.

5. In a shock absorber of thevcharactei` described', a cylinder' havin alower cylinder head and an upper cylinder headprovided with an openinghaving a valve seat, a piston reciprocable in said cylinder and havingan opening therethrough provided with alvalve seat, a pressure operatedvalve cooperable with the valve seat of the pis,-v ton and having 'anelongated valve stem. adapted to. coact with the lower head of f thecylinder to positively operate'said valve an opening and having and asecond pressure operated valve cocylinder head. l 6. In a shockabsorber'of the character described, a cylinder having a lower cylinvderhead and an upper cylinder head rosaid cylinder and having .an openlngtherevalve seat of the cylinder head and a pres'- 25 operable with thevalve seat of the upper 3o' vided with an opening therethrough.y av-ying a valve seat, a piston, reciprooablev in sre valve cooperable withthe valve' seat i controlling communication of said stand pipeA with theatmosphere. Y

` lQMMETT'SYLVESTER LEHR.

